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use crate::types::Rgba;
use na::{Vector2, Vector3};
use serde::de;
use serde::de::{Deserializer, MapAccess, SeqAccess, Visitor};
use serde::ser::{Serialize, SerializeStruct, Serializer};
use serde::Deserialize;
use std::fmt;
pub type VertexRef = u32;
/// A vertex, used to describe a face.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Vertex {
pub position: Vector3<f32>,
pub tex: Vector2<f32>,
pub color: Rgba,
}
impl Serialize for Vertex {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
let mut state = serializer.serialize_struct("Vertex", 5)?;
state.serialize_field("pos_x", &self.position.x)?;
state.serialize_field("pos_y", &self.position.y)?;
state.serialize_field("pos_z", &self.position.z)?;
state.serialize_field("tex_u", &self.tex.x)?;
state.serialize_field("tex_v", &self.tex.y)?;
state.serialize_field("color", &self.color)?;
state.end()
}
}
impl<'de> Deserialize<'de> for Vertex {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
#[derive(Deserialize)]
#[serde(field_identifier, rename_all = "snake_case")]
enum Field {
PosX,
PosY,
PosZ,
TexU,
TexV,
Color,
}
const FIELDS: &'static [&'static str] =
&["pos_x", "pos_y", "pos_z", "tex_x", "tex_y", "color"];
struct VertexVisitor;
impl<'de> Visitor<'de> for VertexVisitor {
type Value = Vertex;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("struct Vertex")
}
fn visit_seq<V>(self, mut seq: V) -> Result<Vertex, V::Error>
where
V: SeqAccess<'de>,
{
let pos_x = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(0, &self))?;
let pos_y = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(1, &self))?;
let pos_z = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(2, &self))?;
let tex_u = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(3, &self))?;
let tex_v = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(4, &self))?;
let color = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(5, &self))?;
Ok(Vertex {
position: Vector3::new(pos_x, pos_y, pos_z),
tex: Vector2::new(tex_u, tex_v),
color,
})
}
fn visit_map<V>(self, mut map: V) -> Result<Vertex, V::Error>
where
V: MapAccess<'de>,
{
let mut pos_x = None;
let mut pos_y = None;
let mut pos_z = None;
let mut tex_u = None;
let mut tex_v = None;
let mut color = None;
while let Some(key) = map.next_key()? {
match key {
Field::PosX => {
if pos_x.is_some() {
return Err(de::Error::duplicate_field("pos_x"));
}
pos_x = Some(map.next_value()?);
}
Field::PosY => {
if pos_y.is_some() {
return Err(de::Error::duplicate_field("pos_y"));
}
pos_y = Some(map.next_value()?);
}
Field::PosZ => {
if pos_z.is_some() {
return Err(de::Error::duplicate_field("pos_z"));
}
pos_z = Some(map.next_value()?);
}
Field::TexU => {
if tex_u.is_some() {
return Err(de::Error::duplicate_field("tex_u"));
}
tex_u = Some(map.next_value()?);
}
Field::TexV => {
if tex_v.is_some() {
return Err(de::Error::duplicate_field("tex_v"));
}
tex_v = Some(map.next_value()?);
}
Field::Color => {
if color.is_some() {
return Err(de::Error::duplicate_field("color"));
}
color = Some(map.next_value()?);
}
}
}
let position = Vector3::new(
pos_x.ok_or_else(|| de::Error::missing_field("pos_x"))?,
pos_y.ok_or_else(|| de::Error::missing_field("pos_y"))?,
pos_z.ok_or_else(|| de::Error::missing_field("pos_z"))?,
);
let tex = Vector2::new(
tex_u.ok_or_else(|| de::Error::missing_field("tex_u"))?,
tex_v.ok_or_else(|| de::Error::missing_field("tex_v"))?,
);
let color = color.ok_or_else(|| de::Error::missing_field("nanos"))?;
Ok(Vertex {
position,
tex,
color,
})
}
}
deserializer.deserialize_struct("Vertex", FIELDS, VertexVisitor)
}
}
|
